Automobile lifting-jack.



J. D. DARBY, B. G. PHILLIPS & E. T. WBSTMORBLAND.

AUTOMOBILE LIF'IING JACK. APPLICATION FILED JULY 23,1913.

Patented June 16, 1914.

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COLUHIIA MIA!" $0., WASHINGTON, D. C.

J. D. DARBY, B. G. PHILLIPS & E. T. WESTMORELAND.

' AUTOMOBILE L'II'TING JACK.

APPLICATION FILED JULY 23, 1913.

1, 1 00,011 Patented June 16, 1914.

2 SHEETSSHEET 2.

J? D. B.C.PHILL|PS E. T. WESTMDHELAND.

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UNITED STATES PATENT OFFICE.

JAMES D. DARBY, BEN C. PI:IILLIPS, A 1\TD EDWIN T. WESTMORELAND, 0FCRESCENT,

SOUTH CAROLINA; SAID PHILLIPS ASSIGNOR TO SAID DARBY AND WESTMORE- LAND.

AUTOMOBILE LIFTING-JACK.

Patented June 16, 1914.

Application filed July 23, 1913. Serial No. 780,823.

To all whom it may concern:

and State of South Carolina, have invented certain new and usefulImprovements 1n Automobile Lifting-Jacks, of which the following is'aspecification, reference being had to the accompanying drawings.

This invention relates to automobile lifting jacks, and it moreparticularly relates to an improved form of stationary lifting jack.

An object of the invention is to provide a lifting jack of thischaracter which is de signed to be permanently seated upon the floor ofa garage, so that when the automobile is run into the garage, it may beimmediately lifted from the floor, for the purpose of relieving thetiresof the machine from the constant strain upon the tires, and to allow anyof the tires or wheels to be removed or otherwise operated upon withease and facility.

Another object is to provide a device of this character which is simplein construction, easily manipulated, strong, durable, comparativelyinexpensive and thoroughly eflicient and practical.

In the accompanying drawings, which supplement this specification,Figure 1 is a side elevation view of the device in its lowered position,an automobile being illustrated in dotted lines in position to be raisedby the jack; Fig. 2 is a side elevation view of our improved jack in itsoperative p0sition for supporting the automobile, as indicated by thewheels shown in dotted lines; Fig. 3 is a top plan view of the device;Fig. 4 is a vertical sectional view on the line 44 of Fig. 3; Fig. 5 isa vertical sectional view on the line 55 of Fig. 3 in lowered position,and Fig. 6 is a view similar to Fig. 5, taken on the same line, but inits elevated posit-ion.

Referring to these drawings, in which similar reference characterscorrespond with similar parts throughout the several views, our improvedlifting jack consists of a stationary frame 10, a movable frame 11, alifting mechanism 12 and stay chains 13.

The stationary frame consists of a rectangular frame member 14, abearing frame member 15, apertured standards 16 and brace members 17,said brace members being securely fastened to the frame 14 and the Be itknown that we, JAMES D. DARBY, BEN C. PHILLIPS, and EDWIN T. WESTMORE-LAND, citizens of the United States, residing 5 at Crescent, in thecounty of Spartanburg standards 16 for holding the latter rigidly invertical position. The standards 16 are each provided with a pluralityof apertures 18 through which bolts 19 extend for pivotally supportingthe front end of the frame 11, and it is obvious that the height of thede vice may be adjusted by moving the bolt 19 from one of the apertures18 to the other.

The bearing frame is securcd to the rear end of the frame 14 by means ofbolts or other securing devices 20, and this frame 15 is apertured, soas to form bearings for the shafts 21, 22 and 23. Upon the shafts 21 and22 are mounted gear wheels 24 and 25 respectively, which mesh with eachother and with a gear wheel 26, the latter being mounted upon the shaft23. The shaft 23 has a lever arm 27 extending rigidly therefrom, whilethe shafts 21 and 22 have lifter arms 28 and 29 respectively, extendingrarially therefrom. The arms 28 and 29 each carry a roller 30, theserollers being peripherally grooved for the reception of the rear end barof the frame 11.

The side bars of the frame 11 are preferably above the respective sidebars of the frame 10, and these side bars are spaced apart a distancesomewhat less than the distance between the wheel hubs of theautomobile, so that the axle of the automobile may be moved into contactwith the frame 11 when the automobile is run into the garage with itsopposite wheels on opposite sides of the lifting jack.

The standards 16 are connected at their tops and bottoms by means ofcrossed brace rods'31, while the crossed chains 13 connect the rear endportion of the frame 10 to that of the frame 11, so as to preventrelative lateral movement, while allowing relative vertical movement ofthe frames 10 and 11.

In operation, the device being in the position shown in Fig. 1, theautomobile is run astride of the jack until its front axle slidesupon'the top of the framell, adjacent to the front end thereof. Now, itwill be seen that the rear axle of the machine is a considerabledistance above the rear end of the frame 11, and that the distancebetween the portion of the frame 11 upon which the front axle rests andthe rear end of the frame is more than five times the distance betweensaid portion of the frame 11 and the bolt or pivot 19, so that theadvantage of a considerable leverage is obtained for raising theheaviest part of the automobile, viz., the front part, it is alsoobvious that a considerable leverage is gained by the difference in sizeof the wheels 25 and 26, while a very great leverage is obtained bymeans of the operating lever arm 27. Now, as the lever arm 27 is swungupward from the position illustrated in Figs. 1 and 5, the shafts21 and22 are rotated thereby, through the medium of the gear wheels, so thatthe arms 28 and 29 and rollers 30 move the rear end of the frame 11 intocontact with the rear axle of the automobile; but before thus cominginto contact with the rear axle, the front axle, wheels and tires havebeen raised, while the arms 28 and 29 have moved into an almost verticalposition, so that when the rear end of the automobile is being raisedthe lifting efliciency is greatly increased, in consequence of theleverage gained by this approximately vertical position of said arms 28and 29. Just before the lever. arm 27 reaches the limit of its swing,the axles 33 of the rollers 30 move through the vertical plane of therespective shafts or axles 21 and 22, and the contact of the lever arm27 with the floor of the garage, or with the ground, prevents furthermovement of the lifter arms, and so the automobile is supported with allof its wheels and tires spaced apart from the floor or ground.

Obviously, when it is desired to lower the automobile onto the floor orground, it is only necessary to move the lever 27 in the directionopposite to that previously described. It is also obvious that, becauseof the leverage described in the foregoing, a very heavy automobile maybe easily raised by a person of ordinary or less than ordinary strength.

It will be seen that we have provided a lifting jack of this characterwhich is fully capable of attaining the foregoing objects in athoroughly practical and efficient inanner.

Whilev the accompanying drawings illustrate what we believe to be thepreferred embodiment of our invention, it is to be understood that theinvention is not limited thereto, but that various changes may be madein the construction, arrangement and proportions of the parts withoutdeparting from the scope of the invention, as defined in the appendedclaims.

-We claim:

1. An automobile jack consisting of a 7 Copies of this patent may beobtained for stationary frame, a movable frame having one end pivotallyconnected to an end of the stationary frame, a bearing member carried bythe opposite end of the frame, a pair of intermeshing wheels, axlesfixedly secured to the respective intermeshing wheels and beingjournaled in said bearing member and each carrying a lifter arm, eachlifter arm having a roller journaled thereon and supporting the free endof said movable frame, a gear wheel of relatively small diameterintermeshing with one of said pair of gear wheels, and a lever armfixedly secured to said relatively small gear wheel.

2. An automobile lifting jack comprising a rectangular frame havingstandards at one end and a bearing member at its other end, shaftsjournaled in said bearing member and carrying a pair of intermeshinggear wheels and a pair of eccentrically mounted rollers, a movable framehaving one end pivotally connected to said standards and having itsother end supported by the rollers on a lower level than its pivotallyconnected end, a relatively small gear wheel intermeshing with one ofthe first said gear wheels, and a lever arm fixedly secured to saidrelatively small gear wheel and adapted to be swung through an angle ofapproximately one hundred and ninety degrees and to co-act with saidgear wheels for moving the eccentrically mounted rollers past thevertical planes of the respective shafts, for raising and securelysupporting an automobile.

3. An automobile lifting jack comprising a stationary frame, amovableframe having one end movably connected to an end of the stationaryframe, a pair of lifter arms pivotally mounted on said stationary frameand extending in opposite directions and each carrying a roller overwhich the free end of the movable frame is supported, and means formoving the centers of the rollers through the vertical planes of thepivotal connections of the respective arms for raising and supportingsaid movable frame.

In testimony whereof we hereunto affix our signatures in the presence oftwo witnesses.

' JAMES D. DARBY.

BEN C. PHILLIPS.

EDWIN T. VVESTMORELAND. lVitnesses D. M. FOWLER,

C. A. FOWLER.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

